JPS623199A - Ventilating fan - Google Patents

Ventilating fan

Info

Publication number
JPS623199A
JPS623199A JP60142956A JP14295685A JPS623199A JP S623199 A JPS623199 A JP S623199A JP 60142956 A JP60142956 A JP 60142956A JP 14295685 A JP14295685 A JP 14295685A JP S623199 A JPS623199 A JP S623199A
Authority
JP
Japan
Prior art keywords
propeller fan
suction
bell mouth
cylinder
gap
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60142956A
Other languages
Japanese (ja)
Inventor
Kazuo Ogino
和郎 荻野
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Ecology Systems Co Ltd
Original Assignee
Matsushita Seiko Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Matsushita Seiko Co Ltd filed Critical Matsushita Seiko Co Ltd
Priority to JP60142956A priority Critical patent/JPS623199A/en
Publication of JPS623199A publication Critical patent/JPS623199A/en
Pending legal-status Critical Current

Links

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  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE:To obtain a ventilating fan having exceedingly low noise even if the static pressure increases, by arranging a propeller fan so that a cylinder having a bell mouth part generates a prescribed gap for the effluence side edge surface of a suction bell mouth. CONSTITUTION:The air inhaled from a suction bell mouth 4 side is introduced into a propeller fan 2 and accelerated. When the static pressure increases during operation, a portion of the inhaled air flows reversely, passing through the gap 7 formed between a cylinder 3 having a bell mouth part and the inside surface of a frame 1. The air which flows reversely is discharged from the gap 6 formed by the suction bell mouth 4 and the cylinder 3 having the bell mouth part, and smoothly inhaled again by the propeller fan 2, and the collision between the inhaled air and the counterflow is suppressed. Therefore, the generation of noise due to the collision is prevented.

Description

【発明の詳細な説明】 産業上の利用分野 本発明は家庭用または設備用の換気扇に関するものであ
る。
DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a ventilation fan for household or equipment use.

従来の技術 一般に換気扇は第2図に示すように本体12とプロペラ
ファン1oよりaす、前記プロペラファン1oの外周と
吸込ペルマウス11内面との間には、前記プロペラファ
ンと前記吸込ペルマウス11の接触を防止するため2〜
4■の空隙が形成されている。
2. Description of the Related Art In general, a ventilation fan has a main body 12 and a propeller fan 1o as shown in FIG. To prevent 2~
A gap of 4 cm is formed.

発明が解決しようとする問題点 このような従来の構成では、吸込側の室内と吐出側の室
内や大気との圧力差(静圧)が大きい場合には、前記空
隙りを吐出側から吸込側へ逆流する流れが発生し、この
逆流と吸込空気の衝突により騒音が増大する問題があっ
た。
Problems to be Solved by the Invention In such a conventional configuration, when the pressure difference (static pressure) between the suction side chamber and the discharge side chamber or the atmosphere is large, the gap is moved from the discharge side to the suction side. There was a problem in that a backflow flow occurred, and the noise increased due to the collision between this backflow and the intake air.

本発明はこのような問題点に留意し、静圧が高くなった
ときに騒音発生を抑制することができる換気扇を提供す
ることを目的とするものである。
The present invention takes these problems into consideration and aims to provide a ventilation fan that can suppress noise generation when static pressure becomes high.

問題点を解決するための手段 この問題を解決するために本発明は、外周にペルマウス
部を有する円筒を一体に装着したプロペラファンと、流
出側の内径を前記プロペラファンの径と同径または大径
に形成した吸込ペルマウスとを有し、前記吸込ペルマウ
スの流入側をフレームに連結し流出側をフレーム内に臨
ませて設けるとともに、吸込ペルマウスの流出側端面に
対し、ペルマウス部を有する円筒が所定の空隙を有する
よりにプロペラファンを配置したものである。
Means for Solving the Problem In order to solve this problem, the present invention provides a propeller fan integrally equipped with a cylinder having a per mouth portion on the outer periphery, and a propeller fan having an inner diameter on the outflow side that is the same diameter or larger than the diameter of the propeller fan. a suction pel mouth formed in a diameter, the inflow side of the suction pel mouth is connected to the frame, and the outflow side is provided facing inside the frame, and a cylinder having a pel mouth part is fixed to the outflow side end surface of the suction pel mouth. A propeller fan is placed in the air gap.

作  用 この構成により、プロペラファンより吐出された空気は
、静圧が上昇したとき少量の空気が前記プロペラファン
外周部を通って、ペルマウス部を有する円筒と吸込ペル
マウス間の間隙よシ前記プロペラファンに吸込まれるが
、前記間隙が前記プロペラファンの吸込み側に位置して
いるので流れが一方向となり従来例のごとき吸込空気流
と逆方向に流れようとする気流の衝突で、騒音上昇の原
因となる乱れが防止できる。
With this configuration, when the static pressure of the air discharged from the propeller fan increases, a small amount of air passes through the outer periphery of the propeller fan and enters the propeller fan through the gap between the cylinder having the pellet mouth portion and the suction pellet mouth. However, since the gap is located on the suction side of the propeller fan, the flow is in one direction, and the collision between the suction airflow and the airflow flowing in the opposite direction as in the conventional example causes an increase in noise. It is possible to prevent such disturbances.

実施例 以下、本発明の一実施例を第1図にもとづいて説明する
EXAMPLE Hereinafter, an example of the present invention will be described based on FIG.

図ニおいて、1はフレーム、2はプロペラファンで、こ
のプロペラファン2の外周にペルマウス部を有する円筒
3を一体に装着し、前記フレーム1内に配設されている
。4は吸込ペルマウスで流入かまたは大径に形成されて
いる。そして、プロペラファン2は吸込ペルマウス4の
流出側端面とペルマウス部を有する円筒3が若干の空隙
6を有するよりに配設されている。
In FIG. 2, 1 is a frame, and 2 is a propeller fan. A cylinder 3 having a per-mouth portion is integrally attached to the outer periphery of the propeller fan 2, and the propeller fan 2 is disposed within the frame 1. 4 is formed with an inflow or a large diameter in the suction per mouth. The propeller fan 2 is arranged such that a cylinder 3 having an outflow side end face of a suction pel mouth 4 and a pel mouth portion has a slight gap 6 therebetween.

なお図中の5は電動機、8はシャッターであり、9はモ
ータ取付足である。
In the figure, 5 is an electric motor, 8 is a shutter, and 9 is a motor mounting foot.

上記構成において、吸込ペルマウス4側から吸込まれた
空気はプロペラファン2に入り加速される。運転中に静
圧が高くなるとペルマウス部を有する円筒3とフレーム
1内面とで形成される空隙7を通り、吸込まれた空気の
一部が逆流する。そしてこの逆流した空気は吸込ペルマ
ウス4とペルマウス部を有する円筒3で形成された空隙
6から吐出され、再びプロペラファン2によりスムーズ
に吸引されるものであり、吸込空気と逆流との衝突は起
らない。したがってこの衝突による騒音を防止すること
ができるのである。
In the above configuration, air sucked in from the suction pel mouth 4 side enters the propeller fan 2 and is accelerated. When the static pressure increases during operation, part of the air sucked back flows through the gap 7 formed between the cylinder 3 having the permouth portion and the inner surface of the frame 1. This backflow air is then discharged from the gap 6 formed by the suction pel mouth 4 and the cylinder 3 having the pel mouth portion, and is smoothly sucked by the propeller fan 2 again, so that no collision occurs between the suction air and the back flow. do not have. Therefore, noise caused by this collision can be prevented.

発明の効果                    
  。
Effect of the invention
.

以上の実施例の説明より明らかなように本発明によれば
、静圧が高くなったときにおいても騒音が極めて低い換
気扇が得られ、その実用的価値はきわめて大である。
As is clear from the above description of the embodiments, according to the present invention, a ventilation fan with extremely low noise even when the static pressure becomes high can be obtained, and its practical value is extremely large.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は本発明の一実施例による換気扇を示す断面図、
第2図は従来の換気扇を示す断面図である。 1・・・・・−フレーム、2・・・・・・プロペラファ
ン、3・・・・・・ペルマウス部を有する円筒、4・・
・・・・吸込ペルマウス、6・・・・・・空隙。 代理人の氏名 弁理士 中 尾 敏 男 ほか1名f−
−7し一部                    
            、ゝ4−−−暖込A−ルマウ
ス 6一 空豫
FIG. 1 is a sectional view showing a ventilation fan according to an embodiment of the present invention;
FIG. 2 is a sectional view showing a conventional ventilation fan. 1...-frame, 2... propeller fan, 3... cylinder having a per-mouth portion, 4...
... Suction per mouth, 6 ... air gap. Name of agent: Patent attorney Toshio Nakao and 1 other person f-
-7 part
,ゝ4---Warmage A-Le Mous 61 Sora

Claims (1)

【特許請求の範囲】[Claims] 外周に、ペルマウス部を有する円筒を一体に装着したプ
ロペラファンと、流出側の内径を上記プロペラファンの
径と同径または大径に形成した吸込ペルマウスとを有し
、前記吸込ペルマウスの流入側をフレームに連結し流出
側をフレーム内に臨ませて設けるとともに、前記吸込ペ
ルマウスの流出側端面に対し前記ペルマウス部を有する
円筒が所定の空隙を有するよりにプロペラファンを配置
した換気扇。
It has a propeller fan integrally equipped with a cylinder having a pel mouth portion on its outer periphery, and a suction pel mouth whose outflow side has an inner diameter equal to or larger than the diameter of the propeller fan, and the inflow side of the suction pel mouth is A ventilation fan connected to a frame and provided with an outflow side facing inside the frame, and a propeller fan arranged such that a cylinder having the permouth part has a predetermined gap with an end face on the outflow side of the suction permouth.
JP60142956A 1985-06-28 1985-06-28 Ventilating fan Pending JPS623199A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60142956A JPS623199A (en) 1985-06-28 1985-06-28 Ventilating fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60142956A JPS623199A (en) 1985-06-28 1985-06-28 Ventilating fan

Publications (1)

Publication Number Publication Date
JPS623199A true JPS623199A (en) 1987-01-09

Family

ID=15327564

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60142956A Pending JPS623199A (en) 1985-06-28 1985-06-28 Ventilating fan

Country Status (1)

Country Link
JP (1) JPS623199A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0283400U (en) * 1988-12-15 1990-06-27
JP2013167189A (en) * 2012-02-15 2013-08-29 Panasonic Corp Ventilator

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0283400U (en) * 1988-12-15 1990-06-27
JP2013167189A (en) * 2012-02-15 2013-08-29 Panasonic Corp Ventilator

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